Answers
EXPLANATION: the doppler radar uses the doppler effect to provide data about the velocity of objects at a distance
Answer:
the one above is not right
Explanation:
Related Questions
Which equation is correctly balanced?
A) CaO + 2H2O + Ca(OH)2
B) NH3 + 202 → HNO3 + H20
C) Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 3H2O
D) Cu + H2SO4 → CuSO4 + H2O + SO2
Answers
All the other equations do not have a “equilibrium” or balanced equation.
Hope this helps! :)
CaO + 2H2O + Ca(OH)2 is a balance chemical equation. Therefore, option A is correct.
What is balance chemical equation ?A balanced chemical equation is one that has the same number of atoms of each type in the reaction on both the reactant and product sides. In a balanced chemical equation, both the mass and the change are equal.
When a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants, according to the law of conservation of mass. As a result, the number of atoms in each element remains constant during the chemical reaction. As a result, the chemical equation must be corrected.
The chemical equation is said to be balanced if there are no inequalities. Every element in this example now has an equal number of atoms on both the reactant and product sides.
Thus, option A is correct.
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Use a scientific calculator to calculate [H+] for the following pH values:
7 (a neutral solution)
5.6 (unpolluted rainwater)
3.7 (first acid rain sample in North America)
How many times higher is the concentration of H+ in the Hubbard Brook sample than in unpolluted rainwater?
Answers
Answer:
pH = 7 ⇒ [H⁺] = 1.0x10⁻⁷ M
pH = 5.6 ⇒ [H⁺] = 2.5x10⁻⁶ M
pH = 3.7 ⇒ [H⁺] = 2.0x10⁻⁴ M
H⁺ concentration in the Hubbard Brook sample is 80 times higher than in unpolluted rainwater.
Explanation:
To answer this problem we need to keep in mind the definition of pH:
pH = -log[H⁺]Meaning that after isolating [H⁺] we're left with:
[H⁺] = [tex]10^{-pH}[/tex]Now we proceed to calculate [H⁺] for the given pHs:
pH = 7 ⇒ [H⁺] = [tex]10^{-7}[/tex] = 1.0x10⁻⁷ MpH = 5.6 ⇒ [H⁺] = [tex]10^{-5.6}[/tex] = 2.5x10⁻⁶ MpH = 3.7 ⇒ [H⁺] = [tex]10^{-3.7}[/tex] = 2.0x10⁻⁴ MFinally we calculate how many times higher is [H⁺] when pH = 3.7 than when pH = 5.6.
2.0x10⁻⁴ / 2.5x10⁻⁶ = 80Answer:
1. 7 (a neutral solution)
Answer: 10-7= 0.0000001 moles per liter
2. 5.6 (unpolluted rainwater)
Answer: 10-5.6 = 0.0000025 moles per liter
3. 3.7 (first acid rain sample in North America)
Answer: 10-3.7 = 0.00020 moles per liter
The concentration of H+ in the Hubbard Brook sample is 0.00020/0.0000025, which is 80 times higher than the H+ concentration in unpolluted rainwater.
Explanation: -
3) Explain why elements in the same group
similar properties
Answers
Answer:
The elements of the same group have the same number of valence electrons, that is why they have similar properties
two different people run a race the graphs track their distance vs. times during the race. Explain the difference between the two runners motions. use words like speed and acceleration.
Answers
Answer:
Runner A is moving at a constant speed, therefore has a positive acceleration.
Runner B is moving at a constant speed, stopping, then speeding up again.
Explanation:
Which statement correctly describes the relationship between air temperature and air pressure?
-Warm air rises, creating an area of low pressure.
-Cool air sinks, creating an area of low pressure.
-Warm air sinks, creating an area of low pressure.
-Cool air rises, creating an area of low pressure.
Answers
Answer:
-Warm air sinks, creating an area of low pressure.
Explanation:
Heat will weigh more, than cool air!
A case of paper has a mass of 2000 g. A case of paper contains 10 reams of paper. One ream of paper is 500 sheets. What is the mass, in grams, of 50 sheets of paper?
Answers
Answer:
s8sooooosoossososososkdk
in today's pandemic,how can you protect our ozone depletion?
Answers
Answer:
if you want to protect our ozone depletion you have aerosol products that don't contain HCFCs and CFCs as stimulus or incitement
Explanation:
why you should use aerosol because when the liquid mixture is freeded or released from the aerosol the liquid propellant becomes a gas so this can easily break up the product into a fine haze or a mist hope its helpful have a good luck
Using the diagram , what is the intersection of plan ABCD and GC?
Answers
Answer:
C
Explanation:
When a line segment and a plane intersect, they intersect at a point. They both coincide on point C
how many mols are in 100.g of Fe?
Answers
Answer:
1.79 moles
Explanation:
1.79 moles
1.79 moles
1.79 moles
1.79 moles
Answer:1.79 moles
1.79 moles are there in 100g of iron.
Explanation:
thats the answer for it
Give one example of
a) Homogeneous mixture of two elements
Answers
Answer:
honey
Coffee
blood
Explanation:
These components are uniformly distrubuted and these cannot be seperated unlike heterogeneous
Ammonia (nitrogen and hydrogen)
Methane(carbon and hydrogen)
Table salt ( sodium and chlorine)
In the reaction 2 FeBr3 + 3 Cl2 → 2 FeCl3 + 3 Br2, how many grams of bromine gas are produced from 2.50 moles of FeBr3?
Answers
Answer:
but iron is 2 and 3 by its valance how could it be possible
HELPP ASAP I’ll mark you as brainlister 100 points :((((
Answers
Answer:
the pool table one
Explanation:
cuz gas just goes EVERYWHERE
The Earth's early atmosphere consisted of what
Answers
Determine if the following would be a buffer system.
H3PO4 and NaH2PO4
H3PO4 and Na2HPO4
Answers
sorry i dont know Explanation:
Balancing chemical equation:
_Na+_MgF2—>_NaF+_Mg
Na= ? Na= ?
Mg= ? Mg= ?
F= ? F= ?
Answers
2Na + MgF2 → 2NaF + Mg
The diffusion of matter and energy in a liquid is slower than diffusion in a gas
True
O False
Answers
Hope this helps
Which characteristic of a planet describes whether the planet has a thick or thin layer of gas?
Atmosphere
Moons
Rings
Surface composition
Answers
Answer:
Atmoshphere!
Explanation:
I took the test and got a 100%! :) Hope this helps, plz mark brainliest!
What is the name of this hydrocarbon?
Answers
Answer:In the given molecule the methyl group is attached at the second carbon atom of the parent chain. Therefore the name of hydrocarbon is 2-methylbutane.
Explanation:
How are the respiratory, urinary, and integumentary systems involved in the removal of waste. (list)
Answers
Answer:
The lungs in the respiratory system excrete some waste such as carbon dioxide. The bladder helps to remove waste by urination.Can someone help, please...?
I really can't understand this...
Answers
6(-393.5) + 3(-285.8) -1(49) -15(0)
What ratio of NaCN to HCN is needed to prepare a pH 9.40 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)
Answers
Answer: The ratio of NaCN to HCN is, 1.26
If you have 12 atoms of hydrogen before a chemical reaction, how many atoms of hydrogen will be present
Answers
Answer:
12 atoms of hydrogen will be present in the product
Explanation:
12 atoms of hydrogen will be present in the product because the law of conservation of mass states that mass is neither created nor destroyed in chemical reactions.
The law of conservation states that the mass of the element remains the same during the course of the reaction.
The law of reaction conformed by the following:-
Mass of reactant Mass of productAccording to the question, the amount of hydrogen is 12 atoms in the reactant and the amount will remain the same at the end of the reaction, which is a product that is 12 atoms
Hence, the amount remains the same in the reaction that is 12 atoms
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When dissolved in water all acids will???
Answers
Answer:
When dissolved in water, acids donate hydrogen ions (H+). Hydrogen ions are hydrogen atoms that have lost an electron and now have just a proton, giving them a positive electrical charge. Bases, on the other hand, mixed with water yield hydroxide ions (OH-). If a solution has a high concentration of H+ ions, then it is acidic.
Explanation:
So b
please everyone do this and send me
Answers
Answer: question 2 is (a) (25+273)k=298k(b) (373+273)k=646k
question 5 is 25 degree Celsius
question 1 is
a = (293-273) =20 degree Celsius
b = (470-273)=197 degree Celsius
question 3 is
a = naphthalene ball undergo sublimation due to which it convert directly into vapour and disappear into air without leaving any solid
b = the participle of perfume diffuse rapidly into air and its smell can be felt while sitting serval metre away
question 4 isthe force of allraction between the particles increases as we go from liquid to gas so the required order is : Oxygen< water< sugar
I hope it is helpful to you
What is the correct formula for the missing product from the equation below:
Na2CO3(aq)
+
CaCl2 (aq)
> NaCl +
Answers
Answer:
CaCO3 (s)
Explanation:
This equation is a double replacement equation, which means that since Na and Cl and paired, Ca and CO3 will be paired.
Then, you look at the charge of each element and balance
Ca has a 2+ charge
CO3 has a 2- charge
The 2+ charge and the 2- charge will cancel so there is no need for a subscript or to balance the equation
The complete equation will be Na2CO3 (aq) + CaCl2(aq) -> NaCl (aq) + CaCO3 (s)
I hope this helps and have a great day!
Why do power plants emit such a high percentage of pollutants?
Answers
They burn fossil fuels, which releases huge amounts of sulfur dioxide and nitrogen oxide that pollute the air. ... Two thirds of all sulfur dioxide and more than one third of all nitrogen oxides that pollute the air.
At which type of tectonic plate boundary is a volcano least likely to occur?
Answers
Answer: the answer is a
Explanation:
I took the test and got it wrong because someone said the answer was divergent boundary and it’s wrong. I hate them I hate them I hate them. I hate it I hate school
Transform boundary is the type of tectonic plate boundary is a volcano least likely to occur.
What is meant by Transform boundary?A transform fault or transform boundary, sometimes called a strike-slip boundary, is a fault along a plate boundary where the motion is predominantly horizontal. It ends abruptly where it connects to another plate boundary, either another transform, a spreading ridge, or a subduction zone.Transform boundary is the type of tectonic plate boundary is a volcano least likely to occur.
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What is the density of a book with a mass of 60g and a volume of 20 cm3? *
Answers
Answer:
[tex]3 g/cm^{3}[/tex]
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
Therefore d = 60g/20cm3 = 3 g/cm3
160
140
120
100
Temperature (°C)
80
60
40
20
0
0
2 4 6 8
10 12 14 16 18 20 22 24 26
Time (min)
.
At what temp will this substance freeze? 70 CV
At what temp will this substance condense? 70 C
How long will it take to release the heat of vaporization? 3 min
What is the melting point? 70 C
In what physical state did this substance end? Gas
All cooling processes, including phase changes, are Exothermic
At 90 C, what phase of matter is this substance? Liquid
Answers
Purpose Question:
If you have a headache, which medicine is the best choice to take?
Your choices are Aspirin, Tylenol or Ecotrin (coated aspirin)
Answers
Answer:
I will take Aspirin if I had a headache